By Henning Friis Poulsen
ISBN-10: 3540223304
ISBN-13: 9783540223306
Three-dimensional x-ray diffraction (3DXRD) microscopy is a singular experimental approach for structural characterisation of polycrystalline fabrics. the placement, morphology, part, pressure and crystallographic orientation of 1000's of grains or sub-grain embedded inside of mm-cm thick specimens could be decided concurrently. moreover, the dynamics of the person structural components should be monitored in the course of average approaches corresponding to deformation or annealing.
The booklet supplies a entire account of the method by way of a precis of chosen functions. the strategy is gifted from a mathematical/crystallographic point-of-view yet with adequate hands-on information to permit the reader to devise his or her personal experiments. The scope of purposes contains paintings in fabrics technological know-how and engineering, geophysics, geology, chemistry and pharmaceutical science.
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5, reconstruction methods are discussed, aimed at overcoming these shortcomings as well as the overall constraint of nonoverlapping diffraction spots. 2 The Orientation, Elastic Strain and Stoichiometry of a Single Grain With detector configuration B, the CMS of each diffraction spot can be determined to high accuracy with respect to the angles 2θ, η and – depending on ∆ω – also ω. From GRAINDEX, a list of such CMS angles can be generated for all the diffraction spots associated with a given grain.
In this case, sampling is provided by a single ω-scan. Another major advantage is that measurements of macroscopic texture and strain can be performed using exactly the same setup [2, 3]. Hence, simultaneous characterization on several length scales is enabled. 2 Diffraction Geometry The algebra for associating diffraction observations with reciprocal space has been well described for single crystals. The polycrystal case differs by the need for one extra coordinate system, since the sample and the grains are separate objects.
Three-dimensional x-ray diffraction microscopy : mapping polycrystals and their dynamics by Henning Friis Poulsen
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